A category 4 hurricane comes on shore with wind speeds of approximately 61.8 m/s. Take the density of air to be 1.29 kg/m² and the pressure to be 90,447 Pa (pressure is lower in a hurricane than normal). What is the pressure different between bottom and top of the roof?

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Chapter14: Fluid Mechanics
Section: Chapter Questions
Problem 86P: Every few years, winds in Boulder, Colorado, attain sustained speeds of 43.0 m/s (about 100 mph)...
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A category 4 hurricane comes on shore with wind speeds of approximately 61.8 m/s. Take
the density of air to be 1.29 kg/m² and the pressure to be 90,447 Pa (pressure is lower in a
hurricane than normal).
What is the pressure different between bottom and top of the roof?
Question 6
Consider a mouse falling through air (rho 1.29 kg/m³). If the mouse has a mass of 29.0 g
(1 kg - 1000 g), what would the terminal velocity of the mouse be?
Take the drag coefficient to be 1 and the area of the mouse to be 34.7 cm² (10,000 cm² = 1
m²).
Note the terminal velocity for a human in a prone position is about 53 m/s. Mice typically
survive a fall of any arbitrary height.
Question 7
Suppose a house has 12 windows, and each window leaks heat out of the house at a cost of
$54.2/year per window. What would the total cost be per year if you replaced the old
windows with new windows that triple the R-value of the windows?
Transcribed Image Text:A category 4 hurricane comes on shore with wind speeds of approximately 61.8 m/s. Take the density of air to be 1.29 kg/m² and the pressure to be 90,447 Pa (pressure is lower in a hurricane than normal). What is the pressure different between bottom and top of the roof? Question 6 Consider a mouse falling through air (rho 1.29 kg/m³). If the mouse has a mass of 29.0 g (1 kg - 1000 g), what would the terminal velocity of the mouse be? Take the drag coefficient to be 1 and the area of the mouse to be 34.7 cm² (10,000 cm² = 1 m²). Note the terminal velocity for a human in a prone position is about 53 m/s. Mice typically survive a fall of any arbitrary height. Question 7 Suppose a house has 12 windows, and each window leaks heat out of the house at a cost of $54.2/year per window. What would the total cost be per year if you replaced the old windows with new windows that triple the R-value of the windows?
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